HQRP Cabin Air Filter for Audi A4 Quattro 2002/2003 / 2004/2009 Activated Charcoal Microfilter plus HQRP UV Meter HQRP&reg; Activated Carbon / Charcoal Cabin Air Filter plus HQRP&reg; UV Meter; Type: Activated Carbon/Charcoal; 100 days warranty!